I just put NTN 32203 bearings in my big swing arm.
They are 40 x 17 x 17.25 basically the same size as oe.
I was able to use the original outer dirt seal from the previous bearings. It isn't a perfect seal, but at least the bearings can now be greased via the pivot bolts.

So with 32203 bearing did you use the earlier pivot bolts and/or spacer?

I was also curious about people who've tried the 30203 bearings, which seem to be the most readily available (read: cheap)